The Gangster Macheath secretly marries the daughter of beggar king Peachum. When Peachum finds out, he instructs the police chief Brown to arrest and hang Macheath. If not, all the beggars of Soho will disturb the upcoming coronation.

The Threepenny Opera proclaims itself "an opera for beggars," and it was in fact an attempt both to satirize traditional opera and operetta and to create a new kind of musical theater based on the theories of two young German artists, composer Kurt Weill and poet-playwright Bert Brecht. The show opens with a mock-Baroque overture, a nod to Threepenny's source, The Beggar's Opera, a brilliantly successful parody of Handel's operas written by John Gay in 1728. In a brief prologue following the overture, a shabby figure comes onstage with a barrel organ and launches into a song chronicling the crimes of the notorious bandit and womanizer Macheath, "Mack the Knife." The setting is a fair in Soho (London), just before Queen Victoria's coronation. In this production, Weill champion HK Gruber led the Ensemble Modern in a performance of Weill's complete original score, the first time it had been heard in Germany in many years. This production was broadcast on German television (3sat).

The Gangster Macheath secretly marries the daughter of beggar king Peachum. When Peachum finds out, he instructs the police chief Brown to arrest and hang Macheath. If not, all the beggars of Soho will disturb the upcoming coronation.

In London at the turn of the century, underworld kingpin Mack the Knife marries Polly Peachum without the knowledge of her father, the equally enterprising 'king of the beggars'.

The French-language version of the The Threepenny Opera with a different cast from the German version.